It's not related to TGP2, it's not really related to anything I guess.
It's initial form was a cluster of 4 interlinked SE pages with a picture on them. The index wasn't really part of the cluster but is there for the surfers that explore the directory content. The pretty net girl gallery was done by a tgp owner, and is a better design than mine. It's 3:30 am here atm, so I'm going to quit, but I'll try to put together a better description for you tomorrow. Freesite2 would be good as a name for the freesite variant if you're happy with it.
The four pictures is a minimum as well, hence the fours up name.